<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>事件代理</title>
  </head>
  <body>
    <ul id="test">
      <li>1</li>
      <li>2</li>
      <li>3</li>
      <li>4</li>
    </ul>
    <script>
      const test = document.getElementById("test");
      test.addEventListener("click", function (e) {
        console.log(e.target.innerText);
      });
    </script>
  </body>
</html>
